Datasheet

LTC2430/LTC2431
18
24301f
Figure 7. External Serial Clock, CS = 0 Operation
Figure 8. Internal Serial Clock, Single Cycle Operation
APPLICATIO S I FOR ATIO
WUUU
EOC
BIT 23
SDO
SCK
(EXTERNAL)
CS
MSBSIG
BIT 0
LSB
BIT 19 BIT 18BIT 20BIT 21BIT 22
DATA OUTPUT CONVERSION
2431 F07
CONVERSION
V
CC
F
O
REF
+
REF
–
SCK
IN
+
IN
–
SDO
GND
CS
REFERENCE
VOLTAGE
0.1V TO V
CC
ANALOG INPUT RANGE
–0.5V
REF
TO 0.5V
REF
2-WIRE I/O
1µF
2.7V TO 5.5V
= 50Hz REJECTION
= EXTERNAL OSCILLATOR
= 60Hz REJECTION
V
CC
LTC2430/
LTC2431
SDO
SCK
(INTERNAL)
CS
MSBSIG
BIT 0
LSB
TEST EOC
BIT 19 BIT 18BIT 20BIT 21BIT 22
EOC
BIT 23
SLEEP
SLEEP
TEST EOC
(OPTIONAL)
DATA OUTPUT CONVERSIONCONVERSION
2431 F08
<t
EOCtest
V
CC
10k
Hi-Z Hi-Z Hi-Z Hi-Z
V
CC
F
O
REF
+
REF
–
SCK
IN
+
IN
–
SDO
GND
CS
REFERENCE
VOLTAGE
0.1V TO V
CC
ANALOG INPUT RANGE
–0.5V
REF
TO 0.5V
REF
3-WIRE
SPI INTERFACE
1µF
2.7V TO 5.5V
LTC2430/
LTC2431
= 50Hz REJECTION
= EXTERNAL OSCILLATOR
= 60Hz REJECTION
V
CC
TEST EOC